The Lifesystems rechargeable hand warmer is a step up from your standard gel hand warmer. It charges via USB, offers different heat settings and doubles up as a power pack in a pinch. At RRP it'll ...

But not so with the Go Warmer ... your hand, put it in your pocket, maybe even sit on it if you’re particularly daring. The possibilities are endless, at least until the 4,000 mAh battery ...

Amazon's rechargeable hand warmers, which have been described ... Charge quickly and have a reasonable battery life too, very pleased with these, and the colour is cool too!" ...